<template>
    <div class="list" ref="wrapper">
        <div>
             <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
                <div class="button-wrapper">
                <div class="button">{{this.currentCity}}</div>
                </div>
            </div>
       </div>
       <div class="area">
           <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
               <div 
                    class="button-wrapper" 
                    v-for="item of hot" 
                    :key="item.id"
                    @click="handleCityClick(item.name)"
                    >
                <div class="button">{{item.name}}</div>
                </div>
            </div>
       </div>
       <div 
            class="area" 
            v-for="(item,key) of cities" 
            :key="key"
            :ref="key"
        >
           <div class="title border-topbottom">{{key}}</div>
           <div class="item-list">
               <div 
                    class="item border-bottom"
                    v-for="innerItem of item"
                    :key="innerItem.id"
                    @click="handleCityClick(innerItem.name)"
               >
               {{innerItem.name}}</div>
           </div>
       </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
// let wrapper = document.querySelector('.wrapper')
// let scroll = new BScroll(wrapper)
export default {
    name:'CityList',
    props: {
        hot: Array,
        cities:Object,
        letter:String
        },
        computed: {
            ...mapState({
                currentCity:'city'
            })
        },
    methods: {
        handleCityClick(city) {
            // this.$store.commit('changeCity',city)
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    mounted () {
        this.scroll = new Bscroll(this.$refs.wrapper,{
            click:true
        })
    },
    watch: {
        letter(newValue, oldValue) {
            if(this.letter)   {
                const element = this.$refs[this.letter][0]
                // console.log(element)
                this.scroll.scrollToElement(element)
            } 
        }
    },
    updated () {
        this.scroll.refresh()
    },
    activated(){
        this.scroll.refresh()
    }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
        &:before
            border-color: #ccc
        &:after
            border-color: #ccc
    .border-bottom
        &:before
            border-color: #ccc
    .list
        overflow: hidden
        position: absolute
        top: 1.58rem
        left: 0
        right: 0
        bottom: 0
    .title
        line-height: .54rem
        background: #eee
        padding-left: .2rem
        color: #666
        font-size: .26rem
    .button-list
        overflow: hidden
        padding: .1rem .6rem .1rem .1rem
        .button-wrapper
            float: left
            width: 33.33%
            .button
                margin: .1rem
                padding: .1rem 0
                text-align: center
                border: .02rem solid #ccc
                border-radius: .06rem
    .item-list
        .item
            line-height: .76rem
            padding-left: .2rem

</style>
